Which of the following would most undermine the main point about decision-making?

• A. a case study with local data
• B. a systematic review with summarized outcomes
• C. anecdotal stories without data
• D. a randomized trial showing improved outcomes

Answer: (C)

Understanding how different kinds of evidence shape conclusions about decision-making is being tested here. Decisions should rest on solid, verifiable information rather than isolated experiences. Anecdotal stories without data can seem persuasive because they’re memorable, but they don’t show that a result would hold across different people or settings. They’re not systematically collected, lack replicability, and are prone to bias, so they undermine any broad claim about how decisions work or what improves outcomes.

In contrast, having local data from a case study provides concrete numbers in a real context, a systematic review combines findings from many studies to highlight patterns, and a randomized trial tests an intervention under controlled conditions to show causality. These forms of evidence strengthen a main argument about decision-making, rather than weaken it.